Question

P is thrice as good a workman as Q and therfore able to finish a job in 48 days less than Q. working together, they can do it in :

 (a) 18 days 

(b) 24 days 

(c) 30 days 

(d) 12 days

Answer 1

Correct option (a) 18 days

Explanation: 

Total work = No. of days× efficiency = 72×1 = 72 

One day work of P and Q is 3+1= 4 units. 

(P+Q) will complete the work in 

= 72/4 = 18 days